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JOSEPH H. FERREIRA, OF NEWARK, NEW JERSEY.`

Letters Patent No. 82,700, dated Octoberl 6, 1868.

IMPROVEMENT IN FLOOI--GI'lAlYIISI TO ALL WHOM I'l MAY CONOERN:

Be it known that I, JOSEPH H. FERREIRA, of Newark, in the county ofEssex, and State of New Jersey, have invented a new and improvedFloor-Clamp; and I do hereby declare that the following is a full andexact description of the same, reference being had to lhe accompanyingdrawings, and to the letters of ref'erei1ce takeno'; therefore,

marked thereon.

f My invention is a simple device for clamping purposes, and may be usedas a floor-clamp, or applied to a work-bench, and consists in certainpartsLwhich are adapted to operate in the manner as will be hereinaftermore fully described. A

In the description of my invention, A is -a bed-piece, resting on abeam, B, and held in its place, while in action, by a shackle, C, one oneach side of the beam.

Figure 2 shows the shackle separately. i

D is a. bolt, sliding inthe bed-piece, and reacted by the spiral springC. `The bolt is thrown forward against the work by the lever F and thecam G, which becomes a. simple Yand very eicient power for the use.

The dotted lines show the bolt thrown forward against the work.

This clamp is capable of being used on a carpenters bench, by 'havingtwo or more pins, H H, underneath' the bed, and going into the bench. Y

The shackle catches under the beam, and, when thc lever is thrownforward,- il; is made tight,`allo\ving any required pressure on thelever; but,-by,sliding the clamp forward, the'shackle is loosencd,^andthe whole is What I'claim as my invention, and desire to secure byLetters Patent, is- The combination, inra clamping-device, of cam G,plunger D, spring E, and shackle C, or pins H, operating substantiallyas and for-the purpose described.

` JOS. H. FERREIRA.

Witnesses:

HORACE HARRIS, S. CLARK.

